Nearly 20 year old high school players. Yikes! I would hope a player that age would be dominating 15-17 year olds.
On the flip side, there's been threads that discuss gap or post grad years for very young high school players. My 2012 was a 13 year old HS freshman and needed another high school year to mature.
Everybody has a story. Age can definitely matter for some. For others (see the very young potential draftees in the article)...they have the talent now.
Good luck to all the players.